Kaspersky AV is an excellent product. For years it was the unrivaled market leader for non-signature-based malware detection in Windows operating systems. Its c

Kaspersky AV is an excellent product. For years it was the unrivaled market leader for non-signature-based malware detection in Windows operating systems. Its competitors are closing the gap, however. Qihoo 360 is also a good product. Among the reverse engineering / exploit development crowd, I haven't heard much complaining about Symantec's detection mechanisms. There are also bespoke anti-malware solutions marketed to the U.S. government, and they are not commercially available specifically to mitigate the risk that malware authors will test their products against anti-malware engines. These bespoke solutions are understandably far more expensive due to their smaller deployment and high quality. It's reasonable that the U.S. government has to consider the need to have the best, reasonably affordable, commercially-available solution for the majority of its systems. This is balanced by the threat that the Russian Federation's government could interdict the software being delivered to the U.S. government client. Intermediate solutions, such as the project that Huawei set up with the UK government, or the source-code sharing that Microsoft does to get Russian contracts, seem to be optimal.